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## Replication Materials for 
## When Poor Students Attend Rich Schools: Do Affluent Social Environments Increase or Decrease Participation?
## Tali Mendelberg, Vittorio Merola, Tanika Raychaudhuri, and Adam Thal
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The following memo describes the materials that can be used to replicate the analyses. Details on how to acquire the replication data are described below.

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## Data Files
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The data file “csscohort_final.dta” is a HERI analysis Stata data file. It contains two-wave panel data from freshman to senior year for all respondents. Each row contains data for a unique respondent. The file can be used to produce all Figures and Tables in the appendix, with the exception of those noted below.

The data file "finconagg.csv" contains data on the aggregate financial concern within a school, and is necessary for producing the results shown in Table 2.

The data files "attrition_small_limited.dta" and "attrition_large_limited.dta" are necessary for producing the results in shown in Appendix Figure 6, Appendix Figure 7, and Appendix Table 24.

The data file "turnout.dta" is necessary for producing the analysis in Appendix Table 10.

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## R Scripts
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The file “Mendelberg et al PoP Replication Code.R” contains all necessary code for reproducing the Tables and Figures in the main paper and appendix. It requires all of the data files discussed above.

Analyses were conducted using R 3.5.2. Packages were updated according to this version of R.
 
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## Acquiring Data Files
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Analysis data files can be acquired through usage agreements with the Higher Education Research Institute for the CIRP Freshman Survey (TFS) and the College Senior Survey (CSS). 

To access the replication dataset for the results reported for the HERI data, please follow these instructions.

The analysis dataset is hosted by the Higher Education Research Institute and can be accessed here: https://heri.gseis.ucla.edu after signing the HERI agreement below and returning it to heri@ucla.edu. Other uses and additional HERI data can be requested from HERI here: http://www.heri.ucla.edu/gainaccess.php. At this website, HERI provides detailed access information and procedures after stating that it "encourages research and scholarly inquiry using the hundreds of data files for research on post-secondary education that HERI maintains. Individuals interested in using HERI data must submit a proposal for data access and should demonstrate a clear idea of the specific project they wish to pursue.” 

HERI AGREEMENT:

The data described below will be provided to NAME subject to the following conditions:
 
DESCRIPTION OF DATASET
STATA and RData files containing the HERI dataset used in Mendelberg, Merola, Raychaudhuri, and Thal PoP.
 
CONDITIONS OF ACCESS AND USE
1. NAME agrees not to disclose in any way any of the data from the data files described above to any other organization or person. Only individuals under the direct supervision of NAME shall have access to these data. NAME shall maintain adequate security to protect these data from inadvertent or unauthorized access or disclosure.
2. NAME agrees that the data will be used solely for statistical analysis and reporting of aggregated information, and not for investigation of specific individuals or organizations. In signing this agreement, NAME gives assurance that such uses of statistical data will conform to widely accepted standards of practice and legal restrictions that are intended to protect the confidentiality of research
subjects and participating institutions.
3. In the event that any of the conditions described herein are violated, NAME agrees
(a) to return or destroy these data and all computer files and tape files created from the original data, and 
(b) to indemnify UCLA, HERI, and its staff against any claims resulting from such violations.
4. NAME agrees to acknowledge CIRP, HERI, and UCLA in any published research. NAME agrees to provide HERI with two copies of all published or released research results within thirty days of publication or release.
5. This agreement will expire 90 DAYS AFTER data delivery. Paragraph 3(b) shall remain in force after termination. Upon expiration of this agreement, NAME agrees to return or destroy these data and all computer files and tape files created from the original data.
6. NAME agrees that the data will be used solely for the purpose of replicating the analysis reported in Mendelberg, Merola, Raychaudhuri, and Thal PoP. 

 
Name of researcher requesting data____________  Date_____________


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## Details on HERI DATA ACCESS
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Obtaining Approval for Use of HERI Data

The Higher Education Research Institute (HERI) encourages research and scholarly inquiry using the hundreds of data files for research on post-secondary education that HERI maintains. Individuals interested in using HERI data must submit a proposal for data access and should demonstrate a clear idea of the specific project they wish to pursue. When reviewing proposals, HERI staff evaluate whether:
	1.	HERI data adequately matches the proposed research project;
	2.	The study design is adequate to answer the questions being asked, theoretical grounding is evident, and the proposal provides sufficient detail about dependent and independent variables;
	3.	The proposal details the process by which the investigator will acquire appropriate institutional review board approval;
	4.	The intended plan specified by the investigator involves advancing scholarship; and
	5.	The research is conducted in a manner that minimizes conflicts with other research conducted by HERI staff or other investigators under previously approved projects.

Fees
There are fees associated with access to HERI datasets. Please contact HERI to discuss study related costs.

Institutional Review Board Approval
Researchers from outside of UCLA must also obtain approval from their own institutional review boards as appropriate. Any necessary local IRB approval can be obtained after HERI approves the project. It is the responsibility of the investigator to determine if local IRB approval is necessary.

HERI Involvement
Approval by HERI does not carry with it any commitment to facilitate the execution of the project beyond access to and descriptions of the data.
Dataset Limitations

HERI will only provide investigators with data files that do not contain individual or institutional identifiers. Datasets that are available for use by scholars outside HERI are those that are three years and older. Currently this means that YFCY, CSS, and DLE datasets up to and including the 2010 administration are available. Freshman Survey data up to and including the fall 2009 are available for data access.

Terms of Approval
Data access is granted for a period of one year from when the data is received. If access to the data is needed for more than one year, a written request for access to the data for a second year is required and must be made prior to the original data access expiration date. After two years, data access expires. If access to the data is still needed, a written status update is required and a formal request for an extension of an approved project. Extension requests must be made prior to the end of the second year expiration date and require approval from the full data access committee. If approved, extensions grant access to the data for a third and final year.

Dissemination
The investigator(s) must submit an electronic copy to HERI of any and all reports, presentations, and publications based on the data at the time of publication/presentation. HERI reserves the right to disseminate your findings on its website in a form compatible with any copyright agreement, if any.
Proposal Narrative
YOUR 3-4 PAGE PROPOSAL MUST INCLUDE THE FOLLOWING SECTIONS
	1.	Title.
	2.	Purpose. Explain the study's theoretical framework. Make reference to the literature as appropriate.
	3.	Research questions and/or hypotheses. Explicitly state your research questions.
	4.	Datasets: Please specify (1) instrument and year - e.g., The Freshman Survey 2000, College Senior Survey 2004, (2) if you require a particular subset (e.g., only women), and (3) please describe dependent variable(s) and independent variable(s). In addition, you need to submit a data access variable list. Requests for entire datasets or for entire question blocks are not typically granted. The variable list must be limited to the variables that are required in order to execute your planned study.
	5.	Method of Analysis. Explain the analyses that will be performed.
	6.	Location of study. Explain if you will be accessing the data in-house at HERI or will need to arrange for off-site access. If you plan on-site access, estimate when and how long you would need to be on-site.
	7.	Dissemination. Describe the proposed dissemination of the results, including: to whom results will be released, how the results will be released, and a timetable for release.
	8.	References.


Submitting your proposal
Please submit the following documents via email (preferred), fax or mail:
	1.	A copy of the full proposal (refer to "Proposal Narrative" above).
	2.	A copy of the data access variable list.
	3.	A copy of a signed cover page.


Additional requirements for student projects

* A letter of support for the research project from a faculty sponsor or department chairperson must accompany the proposal. 
* The faculty sponsor or department chairperson must sign the cover page.


Faculty Sponsors or Department Chairperson

A signed letter of support on department/college stationary is a required part of the proposal submission process for students. This letter needs to address the merit of the proposed research project, including the study design and how the study advances scholarship.

When submitting your proposal, please allow sufficient time for HERI to review your project and ask for clarifications. Proposals are reviewed monthly on the third Wednesday of the month.  Proposals must be received a week before (the second Wednesday of the month) in order to be considered in that monthly cycle.  You will be notified shortly after that meeting about the status of your proposal.



